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CPUs and processes not evenly assigned?!


I had to run a CPU-bound program today on a 2 CPU Xen (AWS) instance.
I expected each process to run on its own process, but what really happened is that both processes were fighting for the first CPU, leaving the second one idle.

NetBSD 7.0/xen with DOMU from Amazon AWS, more details here:

Is this expected behaviour? Definitely surprised me! :)

 - Hubert

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